Laser Pointer Cave Painting

Draw cave paintings on a wall using a laser pointer. Live data feed is provided for reproducing drawings in realtime on a digital twin.

Random.Party.Insta.HANDS.mp4

Setup

• Machine running this client
• Projector pointing at wall
• Camera calibrated to match projection surface
• Camera with lowest possible exposure to only show laser pointer spot
• Laser pointers

Developing client

• npm run dev will launch with nodemon
• FE will reload automatically on file save
• An additional /debug route can be opened on a separate device/window, which will stream details of currently registered shapes

Running client

• Configure webcam:
  • Disable aperture priority mode, ensure exposure mode is set to fixed/manual
  • Reduce exposure until only visible light source is laser pointer on projection wall
• npm run start will launch application on :3000
• Open localhost:3000 in Chrome and fullscreen page

Replaying shapes

• Each time a shape has vanished, it will be sent via socket to the FE server
• FE server submits details to a Supabase database
• Shapes can then later be reproduced, either in realtime or at a later date in a timeline format
• An example of how to consume data can be found, here: https://github.com/RandomStudio/random-studio/tree/master/src/components/PartyHeader